"Honestly I think that personally if we are going to make a sequel to Rising it should feature Frank Yaeger as a main character versus zombies... nano machine-powered zombies. That's what I'm proposing to Platinum and the producer of the project, but they seem to be ignoring me.

Agreed. Perhaps that prequel will tell us how was Maverick formed with Raiden's help, and what odd jobs he have done during that time. I also would like to see more of his interaction with his family if possible.

Yeah that's the point. He was supposedly killed in Zanzibar Land but was made into a Cyborg Ninja by Paramedic. He was kept on Shadow Moses until he broke out during the time Snake arrived. So technically, unless he survived a Rex's foot, there's not exactly a place somewhere in between for him to be slicing zombies lol.